1212002022222 has 64 divisors (see below), whose sum is σ = 2735202297600. Its totient is φ = 397765706400.

The previous prime is 1212002022211. The next prime is 1212002022233. The reversal of 1212002022222 is 2222202002121.

It is an interprime number because it is at equal distance from previous prime (1212002022211) and next prime (1212002022233).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1212002022195 and 1212002022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355533 + ... + 1596999.

It is an arithmetic number, because the mean of its divisors is an integer number (42737535900).

Almost surely, 2^{1212002022222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212002022222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367601148800).

1212002022222 is an abundant number, since it is smaller than the sum of its proper divisors (1523200275378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212002022222 is a wasteful number, since it uses less digits than its factorization.

1212002022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241758 (or 1241752 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1212002022222 its reverse (2222202002121), we get a palindrome (3434204024343).

The spelling of 1212002022222 in words is "one trillion, two hundred twelve billion, two million, twenty-two thousand, two hundred twenty-two".